body,
p,
ul,
ol,
li,
dl,
dt,
dd,
h1,
h2,
h3,
h4,
h5,
h6,
form,
fieldset,
legend,
input,
select,
textarea,
button,
th,
td,
menu {
    margin: 0;
    padding: 0;
}
* {
    box-sizing: border-box;
}
ul,
dl,
ol {
    list-style: none;
}
img,
fieldset,
input[type="submit"] {
    border: 0 none;
}
em {
    font-style: normal;
}
strong {
    font-weight: normal;
}
table {
    border-collapse: collapse;
    border-spacing: 0;
}
button,
input[type="button"] {
    cursor: pointer;
    border: 0 none;
}
a,
button,
input,
img {
    -webkit-touch-callout: none;
}

input,
select,
textarea {
    outline: none;
}
a {
    text-decoration: none;
}
.fl {
    float: left;
}
.fr {
    float: right;
}
.clearfix::after {
    content: "";
    display: block;
    clear: both;
    height: 0;
    overflow: hidden;
}
.clear {
    clear: both;
}
html,
body {
    /*禁止用户选择元素*/
    /*-moz-user-select:none;
 -webkit-user-select: none;
-ms-user-select: none;
 -khtml-user-select:none; */
    /*禁止元素点击出现半透明黑色背景*/
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
html {
    width: 100%;
    font-family: "Helvetica Neue",  Helvetica,  Arial,   "PingFang SC",
          "Hiragino Sans GB",   "Heiti SC",   "Microsoft YaHei",
          "WenQuanYi Micro Hei",  sans-serif;
    outline: 0;
    -webkit-text-size-adjust: none;
}
body {
    margin: 0;
    position: relative;
}
